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1、车联网接纳控制机制研究AbstractInrecentyears,theexplosivegrowthofthevehicleandtheubiquitousinformationneedsmakecommunicationnetworkandvehicleincreasinglybandtogether.Itishopedthatwirelessnetworksignalcancoverthevariousscenesoflife,evenfastaccesstotheInternetinhigh-speedvehicles.Thestudyofvehicu
2、larnetworkhasbecomethefocusoftheworldattention,andalsotopromotethedevelopmentofvehiculestobeintelligentizeandnetworking.Thetechnologybeabletoprovideservicesinthehigh-speedrunningofthevehicleisagreatchallengeinthevehicle-groundcommunicationsoftheradioaccesstechnology.Amongthem,howtoa
3、llocation,managementanduseofthelimitedwirelessresourcesmoreefficientlyhasattractedwidespreadconcerninacademiaandindustry.Asanimportantresearchpartofthenetworkresourcemanagement–admissioncontrolmechanism,becomeoneofthehotspotsofthevehicularnetworkresearch.Thepurposeofthisthesisistost
4、udythemechanismofadmissioncontrolforvehicularnetwork.Basedonsummaryandanalysistheexistingtypicaladmissioncontrolmethod,advancesprogrammeofthevehiclemovementinhigh-speed,andresearchtheadmissioncontrolmechanism.Themaincontentsofthispaperincludethefollowingaspects:1,Calladmissioncontro
5、lisdividedintotwoparts,theresourcereservationandbandwidthallocation.Firstofall,thevehiclecreatemotionprobabilitydensityfunctionaccordingtoitsspeedanddirectionoftravel,andcalculatetheexpecteddirectionofmovement.Then,thevehicleselectthecellhavethestrongestwirelesssignalandreservateban
6、dwidthinthedirection.Finally,thecellsolvetheproblemofbandwidthallocationusingtheprincipalagenttheoryofthegametheory.2,Firstofall,weconstructedasimulationenvironmentofWiMAX,Markovmodelisbeingusedtoanalysiscallrequestblockingprobabilityofconnection-levelperformanceindicatorsofthepropo
7、sedadmissioncontrolalgorithmintheoretically.Theproposedalgorithmiscomparedwiththeclassicalalgorithm.Experimentalresultsshowthattheproposedmethodcanlowerthecallrequestblockingprobabilityeffectively,andmoreuserscanbeacceptedwiththesamebandwidthresources,makethebandwidthutilizationimpr
8、oved,therebyimprovi
